*
     * @return ActionResponse directing to the appropriate page based on authentication result
     */
    @Execute
    public ActionResponse index() {
        if (fessLoginAssist.getSavedUserBean().isPresent()) {
            return redirectToSearchPage().orElseGet(() -> {
                if (logger.isDebugEnabled()) {
                    logger.debug("User is already logged in, redirecting to root.");
                }

 * <pre>{@code
 * // Find child element
 * Element child = parent.child("version").orElse(null);
 *
 * // Check if child exists
 * boolean hasVersion = parent.child("version").isPresent();
 *
 * // Get child text content
 * String version = parent.child("version")
 *     .map(Element::textContent)
 *     .orElse(null);
 *
 * // Get trimmed text content

     * should not matter in practice.
     */
    private String maybeAlignedRefSpec(Logger logger, String defaultRefSpec) {
        if (providerFactory.systemProperty("bwc.checkout.align").isPresent() == false) {
            return defaultRefSpec;
        }

        String timeOfCurrent = execInCheckoutDir(execSpec -> {

          // option from the command line by running Gradle with `-Dspotless.paddedcell`.
          if (providers.systemProperty('spotless.paddedcell').forUseAtConfigurationTime().isPresent()) {
            paddedCell()
          }
        }
      }

      tasks.named("precommit").configure { dependsOn 'spotlessJavaCheck' }
    }
  }

        } else {
            return "";
        }
    }

    private String checkAtLeastOneExists(String message, Stream<? extends Class<?>> stream) {
        if (stream.findAny().isPresent()) {
            return "";
        } else {
            return "Expected at least one " + message + ", but found none.";
        }
    }

    private boolean seemsLikeATest(Class<?> clazz) {

```groovy
public interface NewThing {
    Property<String> getSomeProperty()
}

// Unacceptable
String value
if (!getSomeProperty().isPresent()) {
   value = "convention"
} else {
   value = getSomeProperty().get()
}

// Also unacceptable
String value = getSomeProperty().getOrElse("convention")

// This should be always:

        // Determine target model version
        // Default to 4.0.0 unless --all is specified or explicit --model-version is provided
        String targetModel;
        if (options.modelVersion().isPresent()) {
            targetModel = options.modelVersion().get();
        } else if (options.all().orElse(false)) {
            targetModel = MODEL_VERSION_4_1_0;
        } else {

     */
    private String determineTargetModelVersion(UpgradeContext context) {
        UpgradeOptions options = getOptions(context);

        if (options.modelVersion().isPresent()) {
            return options.modelVersion().get();
        } else if (options.all().orElse(false)) {
            return MODEL_VERSION_4_1_0;
        } else {
            return MODEL_VERSION_4_0_0;
        }

        return ((Collection<?>) value).isEmpty();
      } else if (value instanceof Map) {
        return ((Map<?, ?>) value).isEmpty();
      } else if (value instanceof Optional) {
        return !((Optional) value).isPresent();
      } else if (value.getClass().isArray()) {
        return Array.getLength(value) == 0;
      }
      return false;
    }

    /**

        if (noOptionsSpecified || allOptionsDisabled) {
            return true;
        }

        // Check if --model is explicitly set (and not part of "all disabled" scenario)
        if (options.model().isPresent()) {
            return options.model().get();
        }

        return false;
    }

    @Override
    public String getDescription() {
        return "Applying Maven 4 compatibility fixes";